Automatic window-screen.



M. G. BUNNELL.

AUTOMATIC wmnow SCREEN.

APPLIGATIOH FILED D110. 9, 1910.

Patnted Nov. 3, 1911 2 SHEETS-SHEET 1.

STATES PATENT OFFICE;

monrou a. noun-LL, or c'mcaoo, rumors, Ass xenon to mnnsnrcx c. ausrm, or

cmcaoo, rumors.

AUTOMATIC wIimow-scnimni ,1 misc.

Specification of Letters latent.

Patented Nov. 3, 1914.

T 0 all whom it may concern: V

Be it known that I, MORTON G. BUNNELL, a citizen of the United States of America, and resident of. Chicago, Cook county, Illinois, have invented a certain new and useful Improvement in Automatic Window- Screens, of which the following is a specification.

My invention relates to automatic window screens of the kind in which the screen .is carried on a roller and automatically unwound therefrom when the window is opened. In this way'the screen is normally, as when the window is closed, completely concealed from view, and is automatically brought into use by the opening of the window- Then when the window is closed the screen is automatically rolled up again.

The object of my invention is to provide an improved construction whereby no springs will be necessary for operating the rollers, when the screens are wound up by the closing of the windows, and whereby the said rollers are operated by the usual window weights, the latter thereby serving to control the said screens as well as to counterbalance the window sashes.

The nature and advantages of my invention will, however, hereinafter more fully appsar.

the accompanying drawings Figure 1 is a front elevation of a window having an automatic screen arrangement embodying the principles of my invention, showin the sashes "partly open. Fi 2 is a vertica section on line 22 in 11g. 1. Fig. 3 is an enlarged detail view of a portion of one of the screens, and the adjacent portion of the sash, showing the detachable connection between the two. Fig. 4 is a view similar to Fig.1, but showing certain portions of the frame broken away to show the arrangement of the wei hts and cords, and with the sashes closed. ig. 5 is a vertical section on line 5-5 in Fig. 4.

As thus illustrated, the frame A and up: per and lower sashes B and C may be of any suitable, Mownor approved construction. The upper sash B has a flexible screen b secured to its upper edge, which screen is carried on a rol er bf concealed at the top of the frame. This roller has drums b at the ends thereof, and the weightsb are connec by cords b that are secured to h e o i up 8,

' S5121 and adaptedto wind thereon unwind therefrom, When the sash B is pulled down the screen 6 unwinds and the cords bf are wound upon .the drum b but. when the sash is closed the weights 6 o ,erate the roller 6 to wind up the screen.

elower screen C is-wound upon the roller at the bottom of the frame, andhas its upper end secured to the lower edge of the lower sash (3,. whereby the screen is un- Wound when the sash is raised; The roller has llTS ends provided with drums c for the cords of that havetheir lower endsflsecured r 1, er ends secured to the weights or counterb noes cfl lhe cords c are secured to the sash C and extend upward and over the sheaves c mounted in the sides of the frame. The other ends of these cords of are secured to the said weights c: Thus the raising and lowering of the sash C serves to automatically rotate the roller 0' to first unwind the screen and wind up the cords c and then wind up the screen and unwind said cords.

In Fig. 3 is shown an arrangement for detachably securing the reinforced edge portion 0' to the sash C by means .of screws 0 adapted to extend through holes 0 in the screen, said holes being of a shape and size to permit the screen to be readily unbuttoned from the screw heads, whereby the sashes can be operated without the screen when such is desirable, as in winter, as for --thei purpose of cleaning the window.

us I provide an automatic window screen arrangement in which the screen rolls are operated by thesame weights that counterba ance the sashes. In this way no springs are necessary for winding up the screens.

The sash cords, as shown, are wound on drums, and such drums may be of any.

suitable character, as, for example, those shown may be omitted and the cords wound directly upon the shafts, if such is desired, without in any way departing from the spirit of my invention.

What I claim as my invention is:--

. 1. A window comprising upper and lower sashes, a rolling screen for each sash, a single pair of balancing cords and weights for each sash, the wei hts be' fixed to the depending ends of t e cords t ereof for each sash, the upper sash being connected with the cords thereof through the medium of the upper screen, another pair of cords for connecting the weights of the lower sash with the lower screen, whereby the lower screen is operated positively in both directions by the lower sash, said screens beingv detachably connected with thesashes, and a single pair of sheaves for said window, supporhting the cords and weights of the lower sas 2. A window comprising upper and lower sashes, a rolling screen for each sash, a single pair of balancing cords and weights for each sash, the weights being fixed to the depending ends of the cords thereof for each sash, the upper sash being connected with the cords thereof through the medium of the upper screen,-another pair of cords for connecting the weights 0 the lower sash with the. lower screen, whereby the lower screen is operated positively in both directions by the lower sash said screens being detachably connected with the sashes, a single pair of sheaves for said window, supporting the cords and weights of the lower sash, the said upper screen being secured tothe inside of the upper sash, and the lower screen bein secured to the outside of the lower sash, an said screens having rolls which rotate in oppositc directions when the two sashes are opened.

3. A. window comprising upper and lower sashes, rolling screen for each sash, a single pair of balancing cords and weights for each sash, the weights being fixed to the depending ends of the cords thereof for each sash, the u per sash beingconnected with the cords thereof through the "medium of the upper screen, another air of cords for connectin the weights of the lower sash with the ower screen, whereby the lower screen is operated positively in both directions by the lower sash, said screens being detachably connected with the sashes, a single air of sheaves for said window, supportlng the cords and wei hts of the lower sash, said weights being alT disposed in two parallel vertical planes, one at each side of the window, and said sheaves being disposed between the upper cords and the plane of the upper sash.

Signed by me at Chicago, Cook county, Illinois, this sixth day of December, 1910.

MORTON G. BUNNELL.

Witnesses R. SEHNEM,

S. LEWIS. 

